The last used bookstore in Downtown San Francisco is one of the smallest bookstores just about anywhere.

Internationally-recognized arts center housed in a century-old former military barracks.

A peaceful lake garden and nature reserve in the middle of a residential colony in Pune.

This stately building once housed the office of the university for a brief period of time.

A timber wharf that contributed to Echuca becoming the largest inland port in 19th-century Australia.

A repurposed railway tunnel with otherworldly acoustic characteristics.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

Europe's only Temple of Mithras located in a natural cave.

The remains of a Zoroastrian temple that bore witness to a time when Aden was a flourishing trading hub.

An important pilgrimage site for pagans and early Christians, named for a Celtic goddess-turned-saint.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

A private residence adorned with a gorgeous mural dedicated to the buzzing insect.

Centuries of biking history are nestled in the shadow of the birthplace of contemporary mountain biking.

Fonts are born and bred here at the oldest letterpress type foundry in the United States.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

A B&B on a Victorian lighthouse station in San Francisco Bay.

A piece of crumbling highway infrastructure was repurposed as a high-tech facility for testing racecars.

The "All-Seeing Eye of God" symbol on this library is a clue to one of the many former lives of this building.

At night, a grove of towering redwood trees growing through the pavement block out all light from the so-called “Dark Park” of Madrone Avenue.

Across Ring Mountain is a vast collection of Native American petroglyphs unique to the region.

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.